Allows calls to feature extractors from within feature extractors
Allows calls to feature extractors from within feature extractors


Former-commit-id: c50d4c72c45b5bae0a1f6fc7028e90aa4ba881dd
EQ4/meyda,meyda/meyda,eriser/meyda,hughrawlinson/meyda,meyda/meyda,mcanthony/meyda,meyda/meyda,eriser/meyda